But this year, The Diary of a Teenage girl, based on the hybrid novel/comic by Phoebe Gloeckner, and directed by Marielle Heller is getting very strong reviews. The film stars 22-year-old Bel Powley as Minnie Goetz, a teenage girl whose emerging sexuality finds an outlet in an affair with her mother’s boyfriend. (Kristen Wiig and Alexander Skarsgaard play the mother and boyfriend.) Strong reviews have led the way to the film being picked up by Sony Classics already.